Abstract
Using a cryogenic scanning tunneling microscope (STM), we have performed atomic scale imaging and spectroscopy measurements of individual fullerene nanotube peapods. We show that the encapsulation of the C60 molecules does not modify the structure of the single‐wall carbon nanotube (SWNT) cage yet strongly affects SWNTs’ electronic properties. In particular, spatially resolved measurements show that chains of C60 molecules induce periodic modification of the unoccupied density of states in semiconducting SWNTs. These modifications appear to be caused by coupling of the lowest unoccupied tlu orbitals of the C60 molecules to the unoccupied SWNTs’ one‐dimensional electronic states.
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